DS-SS code acquisition based on simultaneous search and verification

We propose a two-dwell acquisition system with a serial search that operates simultaneously with verification. This system employs two correlation blocks: one for search and the other for verification. The search block continuously searches for the time instants at which the partial correlation valu...

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Bibliographic Details
Main Authors: Hyon Sock Chang, Yong Wan Park, Yong Hoon Lee
Format: Conference Proceeding
Language:English
Subjects:
AWGN
Cities and towns
Correlators
Electronic mail
Frequency conversion
Matched filters
Maximum likelihood estimation
Search methods
Spread spectrum communication
Testing
Online Access:Request full text
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Description
Summary:We propose a two-dwell acquisition system with a serial search that operates simultaneously with verification. This system employs two correlation blocks: one for search and the other for verification. The search block continuously searches for the time instants at which the partial correlation value exceeds a time-varying threshold, and at those instants, the verification block is reset and reinitiated until code acquisition is declared by the verification. The time-varying threshold is updated depending on the partial correlation. The mean acquisition time for AWGN and multiple access environment is evaluated by computer simulation and is compared with that of a two-dwell system which alternates search and verification modes. The results indicate that the proposed system can perform much better than the conventional one.
ISSN:1090-3038
2577-2465
DOI:10.1109/VETEC.1998.686208